Patents by Inventor Ananda Mohan Chatterjee

Ananda Mohan Chatterjee has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Compositions containing impact copolymers made from a blend of a homopolymer phase and a rubber phase having a high ethylene content
    Patent number: 6197886
    Abstract: The present invention relates to compositions containing impact copolymer compositions that are a blend of a propylene polymer phase and a rubber phase in which the ethylene content of the rubber phase is between about 75 to about 95% by weight. The rubber content of the impact copolymer composition ranges between about 35% by weight to about 60% by weight. The crystallinity of the high ethylene-content rubber phase provides overall improvement in film properties and also balance of film tensile properties in the machine and transverse directions. Compared to traditional impact copolymer compositions having a low ethylene content-rubber phase, the inventive copolymers have significantly enhanced melting and crystallization peaks due to polyethylene-like crystallinity in the rubber phase.
    Type: Grant
    Filed: October 24, 1997
    Date of Patent: March 6, 2001
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Ananda Mohan Chatterjee, James Douglas McCullough, Jr.
  • Random copolymer compositions
    Patent number: 6022628
    Abstract: A polymer composition having improved balanced mechanical and optical properties comprising (i) a random copolymer comprising from about 0.8% to about 20% by weight of butene-1 and from about 80% to about 99.2% by weight of propylene, and (2) from about 0%-0.35% by weight of polymer composition of a synthetic amorphous silica antiblock agent.
    Type: Grant
    Filed: August 11, 1997
    Date of Patent: February 8, 2000
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Ananda Mohan Chatterjee, Randolph Neil Campbell